Actions for Maximally concentrating optics for photovoltaic solar energy conversion. Technical progress report, [July 1, 1984--January 31, 1985] [electronic resource].

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Maximally concentrating optics for photovoltaic solar energy conversion. Technical progress report, [July 1, 1984--January 31, 1985] [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 1985.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
39 pages : digital, PDF file
Additional Creators
United States. Department of Energy and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Use of a two-stage concentrator with a fresnel lens primary and a nonimaging dielectric totally internally reflecting secondary, has unique advantages for photovoltaic concentration. Some preliminary ray trace studies have shown that with planar lenses, an increase in angular acceptance for a given geometric concentration to about 2/3 of the maximum theoretical limit can be achieved. To demonstrate this, two preprototype concentrators, each having a geometric concentration of 248:1 for a 0.635cm (0.25 inch) diameter cell, have been designed, built, and tested. Measurements of the angular response show an acceptance of 8° (full angle) which is drastically better than the 1°--2° achievable without a secondary, and is in excellent agreement with the ray trace predictions. For these preprototypes, passive cooling was sufficient to prevent any thermal problems for both the cell and secondary. No problems associated with nouuniform cell illumination were found, as evidenced by the fill factor of 71%--73% measured under concentration. Initial measurements of the system electrical efficiency lie in the range 7.5%--9.9% for a variety of individual cells.
Report Numbers
E 1.99:doe/ch/10201--t3
doe/ch/10201--t3
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
03/07/1985.
"doe/ch/10201--t3"
"DE93002846"
O`Gallagher, J.J.
Chicago Univ., IL (United States). Enrico Fermi Inst.
Type of Report and Period Covered Note
Annual; 01/01/1984 - 12/31/1985
Funding Information
FG02-84CH10201
View MARC record | catkey: 14797059